package com.liyou.full.config;

import com.liyou.full.common.JacksonObjectMapper;
import lombok.extern.slf4j.Slf4j;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurationSupport;

import java.util.List;

@Slf4j
@Configuration
public class WebMvcConfig extends WebMvcConfigurationSupport {

    @Override
    protected void addResourceHandlers(ResourceHandlerRegistry registry) {

        log.info("静态资源映射...");

        registry.addResourceHandler("/backend/**")
                .addResourceLocations("classpath:/backend/");

        registry.addResourceHandler("/front/**")
                .addResourceLocations("classpath:/front/");

    }


    /**
     * 扩展mvc的消息转换器
     * @param converters
     */
    @Override
    protected void extendMessageConverters(List<HttpMessageConverter<?>> converters) {
        log.info("扩展消息转换器...");

        //创建消息转换器对象
        MappingJackson2HttpMessageConverter messageConverter = new MappingJackson2HttpMessageConverter();

        //设置对象转换器，底层使用Jackson将Java对象转换为Json
        messageConverter.setObjectMapper(new JacksonObjectMapper());

        //将对象转换器追加到mvc框架的消息转换器集合中
        //0表示放在最前面，优先使用
        converters.add(0,messageConverter);

    }
}
